Credentials establish a minimum threshold. They tell you someone has passed a test or completed a program or accumulated a certain number of years in a field. They do not tell you whether this specific person will be useful to you in your specific situation. The questions below get at what credentials cannot. Ask them before you commit to an engagement and pay attention to both the content of the answer and how the person responds to being asked.
1. "What is the most similar situation to mine that you have worked on?"
This question tests whether the expert has genuine relevant experience or general experience in a related area. A strong answer describes a specific client or company at a similar stage with a similar problem and tells you what happened. The expert remembers the details because they were actually there. A weak answer stays general -- descriptions of the type of work they do, the industries they have served, the categories of problems they handle. Generality at this question is a signal that their experience is less specific than you need it to be.
2. "What would you NOT do for someone in my situation?"
This question is designed to find experts who know their own limits. A strong answer identifies a specific scope boundary -- something outside their expertise, something that would require a different specialist, or something that they have learned does not work for companies at your stage. That boundary shows self-awareness and intellectual honesty. A weak answer is some version of "I can help with everything." No one can help with everything. An expert who cannot identify what they are not equipped to do is either not self-aware or is telling you what they think you want to hear.
3. "What is your approach to this type of problem in the first session?"
You are looking for a process that starts with understanding before recommending. A strong answer describes how they gather context, what questions they ask, how they diagnose the situation before they advise on it. It demonstrates that they know they do not know enough yet to give good advice. A weak answer is an immediate recommendation based on what you have told them so far. When an expert tells you what to do before they have asked enough questions to understand your situation, they are performing confidence rather than demonstrating competence.
4. "What does success look like at the end of our engagement?"
The purpose of this question is to see whether the expert can commit to a measurable outcome. A strong answer starts with clarifying questions -- they want to know more about your situation before they can define success. After they understand enough, they describe a specific, measurable outcome. A weak answer uses language like "you will have more clarity," "you will feel more confident," or "you will gain a better understanding." These formulations are not outcomes. They are ways of avoiding the commitment that a real success definition requires.
5. "Tell me about a situation where you were wrong and what happened."
This is the most revealing question on the list. A strong answer is a specific story. The expert remembers it well, can tell you what they got wrong, why they got it wrong, and what they have done differently since. Self-awareness about past mistakes is one of the best predictors of trustworthy judgment going forward. A weak answer involves an inability to recall a failure, a deflection to circumstances outside their control, or a story where someone else was at fault. Everyone who has worked extensively in any professional domain has gotten something wrong. If they cannot tell you about it, something is off.
6. "How do you stay current in your field?"
Professional fields change. Tax law changes. Immigration policy changes. Marketing channel dynamics change. An expert who was cutting-edge five years ago may be operating on outdated assumptions today. A strong answer names specific sources, peer networks, ongoing client work, or continuing education. It is concrete and verifiable. A weak answer is "I am always learning" or "I stay up to date" without any specific mechanisms. Genuine currency in a field requires specific habits, not a general orientation toward learning.
7. "What would make you tell me this engagement is not working?"
You want an expert who will tell you the truth even when the truth is uncomfortable for the engagement. A strong answer identifies clear criteria -- specific signals that would lead them to have that conversation with you -- and communicates a genuine willingness to say so directly. A weak answer involves discomfort with the question, over-reassurance that it would never come to that, or a vague commitment to "open communication." An expert who cannot articulate the conditions under which they would fire themselves is an expert whose self-interest may not be aligned with yours.
8. "What should I prepare before we start working together?"
This question tests whether the expert has a real onboarding process or whether they plan to figure it out as they go. A strong answer is a specific list: documents you should gather, questions you should think through in advance, information they will need to be effective from the first session. That list exists because they have worked with enough clients to know what they need. A weak answer is "just show up and we will figure it out." That answer is either a sign that their process is underdeveloped or that they have not thought about your situation carefully enough to know what they would need.
9. "Who is a recent client I can speak to?"
References should be a routine part of evaluating any significant professional engagement. A strong answer provides a name and contact without hesitation. They have clients who are willing to speak on their behalf because the engagement was genuinely useful. A weak answer involves concerns about client privacy, a long delay while they check whether anyone is available, or the suggestion that you look at testimonials on their website instead. None of those alternatives substitute for a real conversation with a real recent client.
10. "What do you need from me to make this work?"
The best experts have been burned by clients who were not responsive, did not do the work required of them, or did not give them the access they needed to be effective. They have learned to set expectations clearly. A strong answer is a clear description of what the engagement requires from you: response time expectations, information you need to provide, decisions you need to be willing to make, access to relevant documents or team members. A weak answer is "just trust the process." That answer is either a sign that the expert has not thought about what they need from you or a soft warning that they do not plan to hold you accountable for your part of the engagement.
For more guidance on finding and working with experts, see The Complete Guide to Hiring a Human Expert and How to Get Maximum Value from an Expert Session.
